Last few mows of the season, do I raise the deck or drop it?

[Oddjob]

In my part of North Carolina fescue was the most common type of grass, but we were always right on the edge of being too hot for fescue. Today we have clearly moved onto the warm season grasses like Bermuda or Zoysia. I have stuck with fescue so far but it is a struggle to keep it alive through the hot and increasingly dry summer. The lawn guys at NC State recommend keeping the blade high to give the heat stressed fescue a better chance of surviving. We also need to aerate and seed in the Fall to maintain fescue lawns. Do cooler climes aerate and seed?